fuller



(No Model.) 3 Sheets-Sheet 1..

L. K. FULLER.

FEED OPERATING MEGHANISM FOR SEWING MACHINES.

3 Sheets-@Sheet 2.

(No Model.)

L. K.,PULLBR FEED OPERATING MEGHANISM POR SEWING MACHINES.

Patented Sept. 2, 1884,

3 Sheets-Sheet 3.

(No Model.)

L. K. FULLER.

EEED OPERATING MEGEANISM .EOE SEWING MACHINES.

.2.72 v e 7?/T070: Qi/E Witnesses.'

N. PETERS. pnmwmhugmpmr. w

trice.

ArnNr LEVI K. FULLER, OF BRATTLEBOROUGH, VERMONT.

FEED-OPERATING MECHANISM FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 304,422, datedSeptember 2, 1884. Application led May 6, 1884. (No model.)

To all whom it may concern.:

Be it known that I, LEVI K. FULLER, a citizen of the United States,residing at Brattleborough, in the county of Vindham and State ofVermont, have invented certain new and useful Improvements inFeed-Operating Mechanism for Sewing-Machines, of which the following isa specifcatiomreference being had therein to the accompanying drawings.

The object of my invention is the production of accurately-balancedfeeding and shuttle-operating mechanisms which are simplein constructionand effective in operation.

In the drawings, Figure l is a sectional side elevation of asewing-machine embodying my improvements. Fig. 2 is a bottom plan viewof the same. Fig. 3 is a vertical section on the line 3 3, Fig. l,looking in the direction of the arrows near said line.` Figs. 4 and 5are detail Views of portions of the feeding mechanism. machine with thebed-plate in section, and Fig. 7 a detail of a modification of thefeedregulating device.

A indicates the bed-plate, and B the bracketarm secured thereto in anysuitable manner.

O is the driving-shaft, journaled in the upper portion of .thebracket-arm and carrying at its forward end the usual appliances foroperating the needle-bar.

D is an eccentric secured to the drivingshaft and embraced by the upperforked end ofthe vertical shuttle-operating lever E, the latter beingloosely connected at its lower end to the rear end of the horizontalshuttle-lever F in a well-known manner.'

G is the feed-cam, secured to the drivingshaft adjacent to theshuttle-operating eccentric, the working-face of said feed-cam being ofa conical form, as clearly shown.

II is a vertical feed-operating lever, which is pivoted by a screw, h,to the downwardlyprojecting arm t' of a saddle or yoke, I, looselysupported on a bolt or pivot-stud, i', sustained by the bracket-arm.This pivoted yoke I is provided with ears 712 on opposite sides of thelever H. A spring, h', (shown in the present instance as a plate-spring)is interposed between the lever H and one of the said ears, thus servingto hold the said lever in contact Fig. 6 is a front end elevation of mywith an adj Listing-screw, 3, passing loosely through a hole in thebracket-arm and tapped in the opposite ear.

It will be obvious that by turning the screw in one direction yor theother the lever H will be adjusted on its pivot h, thus moving its upperend,which is in contact with the feed-cam G, longitudinally of said cam,for the purpose of bringing said lever in contact with the part of saidcam having the requisite throw to produce the length of feed desired. Awasher, i?, (see Fig. 1,) is'preferably interposed between the pivotedyoke l and theinside of the bracket-arm to lessen friction. V

Instead of arranging the adjusting-screw i" as above described, saidscrew might be provided with a conical portion adapted to engage thelever H to adj ust it against the spring h, (see Fig. 7,) said screw insuch case being passed through the front side of the bracketarm at aright angle to the position occupied by the screw shown in Figs. l, 3,and 4.

As it is desirable to pivot the vertical feed v and shuttle leverscentrally of the bracketarm in a horizontal direction, and as thepivotal point ofthe shuttle-lever is above that of the feed-lever, thelatter lever, to avoid contact with the longer pivot-screw of theshuttle-lever, is formed with a bent portion partially surrounding saidpivot-screwand offsetting the lower portion of said feed-lever from itsupper portion, as seen in Fig. 3.

To bring the upper end of the feed-lever smoothly in contact with theconical workingface of the feed-cam, said upper end is preferablybeveled or chamfered off, as shown in the detail view, Fig. 5, tocorrespond approXimately with the said working-face. The pivotalconnection of the lever H with the arm i of the yoke I at some distancefrom the pivotal point of the latter admits of a very considerableadjustment of the upper end of said lever without moving its lowerend,which is in contact with the horizontal feed-lever, to much extent.

J is the main horizontal feed-lever, pivoted on a stud, j, secured tothe bed-plate A, and having its rear end in contact with the lower endof the lever H.' To said main feed-lever is pivoted, at m, the auxiliaryor lifting feedroo lever M, the latter being preferably provided at itsforward end with a projection, m', fitting a recess in the feed-bar K.(See Figs. l, 2, and 6.) The feed-bar is thus supported at one end 5 onthe said lever M, its opposite end lbeing slotted to embrace a pin, a,'passing through one of the guides for the feed-bar ina wellknownmanner. As the lever M is pivoted to and carried by the lever J, thehorizontal movements of thelatter will be communicated to the former,which thus serves, by means of its connection with thefeed-bar, totransmit the horizontal movements of the lever J to said bar.

To move the lever M vertically, for the purpose of lifting the feed-bar,the shuttle-lever F is provided with a wing or projection, f, (see Fig.2,) having a cam or incline, f, between `two horizontal surfaces. Theprojection f engages with the rear end of the liftinglever M, and as theshuttle-lever vibrates, the said lifting-lever will be moved at theproper moment to raise the feed-bar. A spring, I), (see Figs. 2 and 6,)secured to the feed-bar K and to a post, p, on the bottomot' thebed-plate A, serves to move the feed-bar downward and backward, and alsoto hold the rear end of the lever M in contact with the wing f on theshuttlc-lever F. The force of said spring, communicated through thelever M to the lever J, keeps the rear end of the latter lever inconstant contact with the lower end of the vertical feed-lever II, thusforcing the upper end ot' said vertical lever against the feed-cam Gr.A

The main feed-lever J is preferably provided with ribs or bearings 7 forthe lever M to work against, thereby lessening the frictional contact ofthe latter lever with the former; (See Fig. 2.)

On the driving-shaft C is mounted a collar, N, having aradially-projecting portion, n, forming a counter-balance for theshuttle-operating eccentric and the feed-cam, said projection being soarranged relatively to said eccentric and cam as to counter-balancetheir projecting portions on the driving-shafaand thus contribute to asmooth and even movement ofthe latter.

The operation ol' my mechanism is as follows: As the driving-shaft isrotated, the eccentric thereon will impart the usual vibratory motion tothe shuttle-levers, while the feed-levers H and J will be vibratedintermittingly by the feedY cam and the co-operating spring, thus givingthe requisite intermittent forward and backward movements to thefeed-bar, the latter being raised and lowered atV proper intervals bythe auxiliary lever M and the spring, thereby producing the wellknownfour-motion7 feed.

Instead of operating the main horizontal feed-lever by the mechanismshown, said feedlever may be so connected with the feed-cam as toreceive positive movements in both directions, as by a vertical lever,with an ad- 65 justable fulcrum, and having a yoke at its upper end,embracing a feed-cam, anda forked connection at its lower end with thehorizontal lever.

I claim as my inventionl. In a sewing-machine, the combination, with afeed-bar, of a main feed-lever, an aux iliary feed-.lever pivoted tosaid main feedlever, and means for intermittingly vibrating said leversin planes at right angles to each other, substantially as described.

2. In a sewing-machine, the combination, with a feed-bar, of a mainfeed-lever pivoted beneath the bed-plate, an auxiliary feed-leverpivoted to said main feed-lever, means for vibrating said mainfeed-lever horizontally, and means for vibrating said auxiliaryfeedlever vertically, substantially as set forth.

3. In a sewing-machine, the combination, with a feed-bar, of main andauxiliary feed levers, the latter pivoted to the former, and botharranged beneath the bed-plate, mechanism for vibrating said mainfeedlever horizontally, and a shuttle-lever having a device for movingsaid auxiliary feed-lever vertically, substantially as described.

et. In a sewing-machine, the combination, with a feed-bar, of a mainhorizontal feedlever, an auxiliary feed-lever pivoted to said mainfeed-lever, means for vibrating said auX- iliary lever vertically, avertical feed-lever engaging said main horizontal feed-lever, and meansfor vibrating said vertical lever, substantially as described.

5. In a sewing-machine, the combination,

with a feed-bar, of'a main horizontal feedlever, an auxiliary feed-leverpivoted to said main feed-lever, means for vibrating said auxiliarylever vertically, a vertical feed-lever engaging said mainfeed-lever,means for vibrating said vertical lever, and means for varying thevibrations thereof, substantially as set forth.

6. The combination, with the bracket-arm ol'a sewing-machine, ofadriving-shaft, a conical feed-cam thereon, asaddle or yoke pivoted tothe vertical portion of said bracket-arm, a vertical feed-leverpivoted-to said yoke, an adj usting-serew for varying the position ofsaid lever relative to said cam, and a spring to hold said lever againstsaid screw, substantially as set forth.

7. The combination, with the bracket-arm of a sewing-machine, of adriving-shaft, a conical feed-cam thereon, a saddle or yoke pivoted tothe vertical portion of said bracket-arm,

and provided with a downwardly-projeetingV arm, a feed-lever pivoted tothe said arm. of said yoke, an adj Listing-screw for varying theposition of said lever relative to said cam, and a spring serving tohold said lever against said screw, substantially as set forth.

8. In a sewing-machine, the combination, with afeed-bar, of main andauxiliary feedlevers, the latter pivoted to the former, lugs on one ofsaid levers for lessening their frictional Contact, and means forintermittingly In testimony whereof Iafx my signature in Io vibratingsaid levers in planes at right angles presence 0I" two Witnesses. toeach other, substantially as set forth.

9. The combination of the drvngshaft C, LEVI K. FULLER. 5 eccentric D,shuttle-levers E and F, the latter having a wing or projection, f,formed with XVitnesses: an incline, f', the feed-cam G, feed-levers H,W. H. CHILDS,

J, and M, yoke I, feed-bar K, and Spring P, l J. n. HALL. substantiallyas set forth. A

